\begin{tikzpicture}
    \tkzDefPoints{0/0/O}
    \tkzDefPoint(285:1.5){A}
    \tkzDefPoint(105:1.5){B}
    \tkzDefPoint(230:1.5){D}
    \tkzDefPoint(50:1.5){E}
    \tkzDefLine[parallel=through A](D,E)  \tkzGetPoint{c}
    \tkzInterLC[common=A](A,c)(O,A)  \tkzGetFirstPoint{C}

    \tkzDrawCircle[thick](O,A)
    \tkzDrawSegments(A,B  D,E)
    \tkzDrawSegments(A,C  C,E  E,B)
    \tkzDrawPoint(O)
    \tkzLabelPoints[left](O)
    \tkzLabelPoints[below](A,D)
    \tkzLabelPoints[above](B,E)
    \tkzLabelPoints[right](C)
\end{tikzpicture}

